DevTools: [SASS] introduce Gonzales-PE for SCSS parsing

third_party/WebKit/Source/devtools/front_end/sass/ASTService.js

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 /**
  * @constructor
  */
 WebInspector.ASTService = function()
 {
-    this._sassInitPromise = self.runtime.instancePromise(WebInspector.TokenizerFactory);
-    this._terminated = false;
 }
 
 WebInspector.ASTService.prototype = {
     /**
      * @param {string} url
      * @param {string} text
      * @return {!Promise<!WebInspector.SASSSupport.AST>}
      */
     parseCSS: function(url, text)
     {
-        console.assert(!this._terminated, "Illegal call parseCSS on terminated ASTService.");
         return WebInspector.SASSSupport.parseCSS(url, text);
     },
 
     /**
      * @param {string} url
      * @param {string} text
      * @return {!Promise<!WebInspector.SASSSupport.AST>}
      */
     parseSCSS: function(url, text)
     {
-        console.assert(!this._terminated, "Illegal call parseSCSS on terminated ASTService.");
-        return this._sassInitPromise.then(tokenizer => WebInspector.SASSSupport.parseSCSS(tokenizer, url, text));
+        return WebInspector.SASSSupport.parseSCSS(url, text);
     },
 }